This species probably spawns in winter and early spring. The pelagic larval stage seems to last fairly long. S. subtruncata is a suspension feeder and forms an important food item for diving birds like the Common Scooter that overwinter along the Dutch coast (Ziegelmeier, 1957; Wolff, 1973).
Cut trough shells are found in a narrow stroke along the entire North Sea coast. They rarely found any further out to sea. They are often called spisula. This shellfish is the most important source of food for the common scoter. Eiders also forage on spisula when there's not much other food to find. The shells (fresh and fossil) wash ashore in large amounts on the North Sea beaches. In southern Europe, you often find this shellfish in paella. In that case, they are usually caught elsewhere, such as the Dutch coast. There are some places where it is forbidden to fish spisula, the Voordelta in Zeeland is an example, where they shellfish are left for the birds.
The distribution area of Spisula subtruncata stretches across the entire Belgian part of the North Sea. In the 1994-2001 period, however, a preference for the near-coastal zone could be observed. Very high concentrations (up to 1,300 ind./m2) were especially observed near the western near-coastal zone.